145989133 has 2 divisors, whose sum is σ = 145989134. Its totient is φ = 145989132.

The previous prime is 145989127. The next prime is 145989163. The reversal of 145989133 is 331989541.

145989133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86359849 + 59629284 = 9293^2 + 7722^2 .

It is a cyclic number.

It is not a de Polignac number, because 145989133 - 2⁵ = 145989101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145989133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145989163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72994566 + 72994567.

It is an arithmetic number, because the mean of its divisors is an integer number (72994567).

Almost surely, 2^145989133 is an apocalyptic number.

It is an amenable number.

145989133 is a deficient number, since it is larger than the sum of its proper divisors (1).

145989133 is an equidigital number, since it uses as much as digits as its factorization.

145989133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 43.

The square root of 145989133 is about 12082.5962855671. The cubic root of 145989133 is about 526.5506781821.

The spelling of 145989133 in words is "one hundred forty-five million, nine hundred eighty-nine thousand, one hundred thirty-three".